Magnetic and axial-vector transitions of the baryon antidecuplet
| dc.creator | Kim, H. -Ch. | |
| dc.creator | Yang, Gh. -S. | |
| dc.creator | Goeke, K. | |
| dc.date | 2007-04-13 | |
| dc.date.accessioned | 2026-07-07T11:40:59Z | |
| dc.date.available | 2026-07-07T11:40:59Z | |
| dc.description | We report the recent results of the magnetic transitions and axial-vector transitions of the baryon antidecuplet within the framework of the chiral quark-soliton model. The dynamical model parameters are fixed by experimental data for the magnetic moments of the baryon octet, for the hyperon semileptonic decay constants, and for the singlet axial-vector constant. The transition magnetic moments $μ_{ΛΣ}$ and $μ_{NΔ}$ are well reproduced and other octet-decuplet and octet-antidecuplet transitions are predicted. In particular, the present calculation of $μ_{ΣΣ^*}$ is found to be below the upper bound $0.82μ_N$ that the SELEX collaboration measured very recently. The results explains consistently the recent findings of a new $N^*$ resonance from the GRAAL and Tohoku LNS group. We also obtain the transition axial-vector constants for the $Θ^+\to KN$ from which the decay width of the $Θ^{+}$ pentaquark baryon is determined as a function of the pion-nucleon sigma term $Σ_{πN}$. We investigate the dependence of the decay width of the $Θ^{+}$ on the $g_{A}^{(0)}$, with the $g_{A}^{(0)}$ varied within the range of the experimental uncertainty. We show that a small decay width of the $Θ^{+}\to KN$, i.e. $Γ_{ΘKN} \leq 1$ MeV, is compatible with the values of all known semileptonic decays with the generally accepted value of $g_{A}^{(0)} \approx 0.3$ for the proton. | |
| dc.description | 8 pages, 5 figures, Talk given at the Yukawa International Seminar (YKIS) 2006, "New frontiers in QCD", Kyoto, Japan, 20 Nov. - 8 Dec. 2006 | |
| dc.identifier | https://arxiv.org/abs/0704.1777 | |
| dc.identifier | http://arxiv.org/abs/0704.1777 | |
| dc.identifier | Prog.Theor.Phys.Suppl.168:62-69,2007 | |
| dc.identifier | doi:10.1143/PTPS.168.62 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/200382 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Magnetic and axial-vector transitions of the baryon antidecuplet | |
| dc.type | text |